Vitamin D as an immune modulator in multiple sclerosis

Area of Science:

• Neuroimmunology
• Environmental Medicine

Background:

• Multiple sclerosis (MS) is a chronic central nervous system disorder involving inflammation, demyelination, and neurodegeneration.
• Environmental factors, particularly vitamin D and sun exposure, are known to influence MS development and activity.
• Vitamin D's effect on immune parameters is established, but its clinical impact in MS remains debated.

Purpose of the Study:

• To review the current understanding of vitamin D's effects on immune cell subsets in multiple sclerosis.
• To correlate findings from experimental and clinical studies regarding vitamin D and MS.

Main Methods:

• Literature review of experimental and clinical studies.
• Analysis of vitamin D's impact on immune cell subsets relevant to MS pathogenesis.
• Examination of epidemiological and clinical data linking vitamin D levels and sun exposure to MS parameters.

Main Results:

• Vitamin D significantly impacts various immune cell subsets, as confirmed in experimental models.
• Both serum vitamin D levels and sun exposure correlate with MS epidemiological and clinical features.
• The clinical efficacy of vitamin D supplementation for MS remains inconclusive.

Conclusions:

• Vitamin D plays a crucial role in modulating immune responses implicated in multiple sclerosis.
• Further research is needed to clarify the therapeutic potential of vitamin D supplementation in managing MS clinical outcomes.